Games like Romans: Age of Caesar
Games like Romans: Age of Caesar include Manor Lords, Workers & Resources: Soviet Republic, Against the Storm, Empires of the Undergrowth, and Kingdoms and Castles. We matched them by the tags players give Romans: Age of Caesar on Steam (Strategy, Free to Play, Massively Multiplayer, City Builder, and Simulation): closest matches first, and among equally close ones the better-known games.

Manor Lords
Shared: Strategy · City Builder · Simulation

Workers & Resources: Soviet Republic
Shared: Strategy · City Builder · Simulation

Against the Storm
Shared: Strategy · City Builder · Simulation

Empires of the Undergrowth
Shared: Strategy · Simulation · City Builder

Kingdoms and Castles
Shared: City Builder · Strategy · Colony Sim

Cities: Skylines
Shared: City Builder · Strategy · Simulation

Stronghold: Definitive Edition
Shared: Strategy · City Builder · Real Time Tactics

Prison Architect
Shared: Simulation · Strategy · Colony Sim

Norland
Shared: Strategy · City Builder · Simulation

Banished
Shared: Strategy · City Builder · Colony Sim

Anno 117: Pax Romana
Shared: Strategy · City Builder · Simulation

Game of Thrones Winter is Coming
Shared: Free to Play · Strategy · Massively Multiplayer

Stronghold Crusader: Definitive Edition
Shared: Strategy · City Builder · Colony Sim

Anno 1800
Shared: Strategy · City Builder · Simulation

Dawn of Man
Shared: Strategy · City Builder · Colony Sim

Whiskerwood
Shared: Strategy · City Builder · Simulation

Stronghold HD (2012)
Shared: City Builder · Colony Sim · Real Time Tactics

Foundation
Shared: Strategy · City Builder · Simulation

Cataclismo
Shared: Strategy · City Builder · Simulation

Songs of Syx
Shared: Strategy · City Builder · Colony Sim

Dwarf Fortress
Shared: Strategy · Colony Sim · Simulation

Cities: Skylines II
Shared: City Builder · Simulation · Strategy

Europa Universalis IV
Shared: Strategy · Grand Strategy · Simulation

Crusader Kings III
Shared: Strategy · Simulation · Grand Strategy